Muslim empire

how the Muslim empire spread was out of mecca east to India west across north Africa and on into Spain.

the empire expanded because the military conquered and took over 100 years, they were great fighters if they died in battle they believed that they would go directly to haven because they fought in a holy war which they called Jihad.Their golden ages were in 700-900 A.D. there were many contributions to our society like math and astronomy because they spread Gupta math ideas and learned astronomy from the Greek ideas. Also they created architecture and banking, a great idea that they used was preserving Greek and Roman ideas and culture.